21001120002111 has 8 divisors (see below), whose sum is σ = 28011504607024. Its totient is φ = 13995741032640.

The previous prime is 21001120002103. The next prime is 21001120002127. The reversal of 21001120002111 is 11120002110012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21001120002111 - 2³ = 21001120002103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001120002151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251399070 + ... + 1251415851.

It is an arithmetic number, because the mean of its divisors is an integer number (3501438075878).

Almost surely, 2^{21001120002111} is an apocalyptic number.

21001120002111 is a deficient number, since it is larger than the sum of its proper divisors (7010384604913).

21001120002111 is a wasteful number, since it uses less digits than its factorization.

21001120002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502817721.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001120002111 its reverse (11120002110012), we get a palindrome (32121122112123).

The spelling of 21001120002111 in words is "twenty-one trillion, one billion, one hundred twenty million, two thousand, one hundred eleven".